<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主题区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px': '200px'">
                <div class="toggle-button" @click="toggleCollapse">
                    |||
                </div>
                <!-- 侧边栏菜单区域 -->
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened
                         :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.path + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/' + childrenItem.path" v-for="childrenItem in item.children"
                                      :key="childrenItem.id" @click="saveNavState('/' + childrenItem.path)">
                            <template slot="title" >
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{childrenItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体-->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        name: "Home",
        data() {
            return {
                // 左侧菜单数据
                menulist: [],
                iconsObj: {
                    '125': 'iconfont icon-user',
                    '103': 'iconfont icon-tijikongjian',
                    '101': 'iconfont icon-shangpin',
                    '102': 'iconfont icon-danju',
                    '145': 'iconfont icon-baobiao'
                },
                // 是否折叠
                isCollapse: false,
                // 被激活的链接地址
                activePath: ''
            }
        },
        methods: {
            logout() {
                // 清空sessionStorage的token
                window.sessionStorage.clear()
                this.$router.push('/login')
            },
            // 获取所有菜单
            async getMenuList() {
                const {data: res} = await this.$http.get('menus')
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
                // console.log(this.menulist)
            },
            // 点击按钮，切换菜单的折叠和展开
            toggleCollapse() {
                this.isCollapse = !this.isCollapse
            },
            // 保存链接的激活状态
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }

        },
        created() {
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
        }
    }
</script>

<style scoped>
    .home-container {
        height: 100%;
    }

    .el-header {
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #fff;
        font-size: 20px;
    }

    .el-header div {
        display: flex;
        align-items: center;
    }

    .el-header div span {
        margin-left: 15px;
    }

    .el-aside {
        background-color: #333744;
    }

    .el-aside .el-menu {
        border-right: none;
    }

    .el-main {
        background-color: #eaedf1;
    }

    .iconfont {
        margin-right: 10px;
    }

    .toggle-button {
        background-color: #4A5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
    }
</style>